EP1972754A1 - Befestigungsglied und Gaskompressor damit - Google Patents

Befestigungsglied und Gaskompressor damit Download PDF

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Publication number
EP1972754A1
EP1972754A1 EP08075205A EP08075205A EP1972754A1 EP 1972754 A1 EP1972754 A1 EP 1972754A1 EP 08075205 A EP08075205 A EP 08075205A EP 08075205 A EP08075205 A EP 08075205A EP 1972754 A1 EP1972754 A1 EP 1972754A1
Authority
EP
European Patent Office
Prior art keywords
fastener member
bolt
bath
coated
gasket
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08075205A
Other languages
English (en)
French (fr)
Inventor
Tsuda Masahiro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli Corp
Original Assignee
Calsonic Compressor Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Calsonic Compressor Inc filed Critical Calsonic Compressor Inc
Publication of EP1972754A1 publication Critical patent/EP1972754A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C18/3446—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B1/00—Devices for securing together, or preventing relative movement between, constructional elements or machine parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/91—Coating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/805—Fastening means, e.g. bolts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0469—Other heavy metals
    • F05C2201/0493—Tin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0469—Other heavy metals
    • F05C2201/0496—Zinc
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0865—Oxide ceramics
    • F05C2203/0891—Zinc oxide

Definitions

  • the present invention relates to a fastener member and a gas compressor using the fastener member, specifically, it relates to an improvement in combination between a bolt and a gasket.
  • JP2005-194553A a bolt is used as one part of a fastener member. Mainly, from the perspectives of appearance and corrosion resistance, the bolt is provided with various coatings.
  • a chloride bath acidic bath; coating bath with ammonium chloride as the main constituent
  • the chloride bath includes chloride ions, it is problematic since COD within the discharged water (Chemical Oxygen Demand), which accelerates the corrosion of the coating bath, is high.
  • an aluminum gasket conventionally used in combination with a bolt coated in a chloride bath when combined with a bolt coated in a zincate bath, generates more leakage than the leakage generated between a bolt coated in a chloride bath and an aluminum gasket.
  • the present invention takes into consideration the above situation and is intended to provide a fastener member, when in a state combined with a bolt coated in a zincate bath, in combination with a gasket that does not generate any leakage or can substantially suppress any leakage.
  • the present invention is intended to provide a gas compressor that does not generate leakage from the fastener member or can substantially suppress any leakage when the fastener part is fastened by the fastener member comprising the bolt coated in a zincate bath and the gasket.
  • a first aspect of the present invention relates to a fastener member including a blot coated with a zincate bath, and a copper gasket coated with tin combined with the bolt.
  • a second aspect of the present invention relates to a gas compressor including a housing having a case and a front head fastened by a first fastener member and a holding space in an interior portion thereof, and a compressor main body, which compresses gas, held in the holding space and fastened to the housing by a second fastener member, wherein at least one of the first fastener member and the second fastener member is the fastener member as described above.
  • FIG. 1 is a figure that illustrates a compressor 100 of a vane rotary type as one embodiment of a gas compressor according to the present invention and a cross-section along an A-A line of a later-described FIG. 3 .
  • FIG. 2 is an enlarged diagram that illustrates a part B on FIG. 1 in detail.
  • FIG. 3 is a side view seen from a direction of arrow C in FIG. 1 .
  • the compressor 100 illustrated contains a compressor main body 60 that compresses gas in a holding space inside a housing 10.
  • the housing 10 includes a case 11 and a front head 12.
  • the case 11 has an open end and is in an approximately cylindrical shape.
  • the front head 12 covers the open end of the case 11 and in the inside part defines a closed holding space.
  • the case 11 and the front head 12, as shown in FIG. 3 are fastened by six first fastener members 80 disposed at an approximately equal angle interval with a rotating axis 51 of the compressor main body 60 as the center.
  • the compressor main body 60 is fastened to the front head 12 by four second fastener members 70 which are disposed to correspond to four edges of a rectangle with the rotating axis 51 as the approximate center.
  • the compressor main body 60 is retained in a predetermined position in the holding space inside the housing 10.
  • the compressor main body 60 includes a rotating shaft 51 rotated and driven along a shaft rotating by a transfer mechanism not illustrated that is, a rotor 50 that rotates integrally with the rotating shaft 51, a cylinder 40 with both ends open and having an inside circumference surface whose cross-section contour is in an approximate elliptical shape, encircling an external side of an outside circumference surface of the rotor 50, five vanes 58 in the form of plates disposed on the rotor 50 in intervals of equal angles around the rotating shaft 51, buried in the rotor 50 so as to freely project from the outside surface of the rotor 50, with projected ends in contact with the inside circumference surface of the cylinder 40, and a rear side block 20 and a front side block 30 fixed to the cylinder so that each covers an open end surface from an external side of the both open end surfaces of the cylinder 40.
  • a transfer mechanism not illustrated is, a rotor 50 that rotates integrally with the rotating shaft 51, a cylinder 40 with both ends open and having an inside
  • the gas within the compression room 48 (compression gas with high pressure) is discharged from the compression room 48 to a holding room of the housing. Furthermore, the gas is discharged from the holding room to the outside of the housing 10 so that compressed gas is supplied to the outside.
  • the second fastener member 70 that fastens the compressor main body 60 and the front head 12 includes a bolt 71 coated in a zincate bath in combination with a copper gasket 72 coated with tin.
  • a through-hole 31 that passes through in the thickness direction towards a thickness part 42 of the cylinder 40 is formed on the front side block 30.
  • the bolt 71 fastens the front head 11 and the cylinder 40 via the through-hole 31 formed on the front side block 30.
  • the gasket 72 is disposed in a position sandwiched by the front head 11 and the bolt 71.
  • the zincate coating on the bolt 71 is preferably applied at least to an area where the bolt 71 is in contact with the gasket 72 (normally, the seating surface of the bolt 71) when the bolt 71 is in a state fastened to a fastener target (the cylinder 40 of the present embodiment).
  • the coating of tin on the copper gasket 72 is preferably applied at least to an area where the gasket 72 is in contact with the bolt 71 (normally, the surface which the seating surface of the bolt 71 makes contact with) when the bolt 71 is in a state fastened to a fastener target (the cylinder 40 of the present embodiment).
  • Hardness (for example, Vickers hardness Hv) of the bolt 71 coated with the zincate coating is found to be characteristically higher than a conventionally-used bolt coated with a chloride coating by the inventors of the present application.
  • the coating by the zincate coating is estimated to have less elastic growth than the coating by the conventional chloride bath.
  • the seating surface of the bolt begins to contact the surface of a gasket made of the aluminum material which is conventionally used in combination with a bolt coated in the chloride coating.
  • the coating by the chloride bath is elongated in compliance to the slide between the surfaces in contact with each other so that the coating does not easily peel off from the bolt.
  • the seating surface of the bolt 71 begins to contact the surface of the gasket made of the aluminum material conventionally used in combination with the bolt coated with the chloride bath.
  • the coating by the zincate bath does not elongate because of frictional resistance and peels off because of less elongation in comparison to the coating by the chloride bath.
  • the coating of the zincate bath peeled off remains sandwiched in the gap between the surface of the gasket made of the aluminum material and the seating surface of the bolt 71.
  • the coating by the zincate bath remaining sandwiched in the gap between the surface of the gasket made of the aluminum material and the seating surface of the bolt 71, as described above, has a higher hardness than coating by the chloride bath. Therefore, even when the bolt 71 is in a state fastened to the cylinder 40 by prescribed torque, it was found by the inventors of the present application that the coating by the zincate bath remains uncrushed between the surface of the gasket made of the aluminum material and the seating surface of the bolt 71,
  • the gasket combined with the bolt 71 coated with the zincate bath is not a conventionally used gasket made of an aluminum material, but the gasket 72 made of copper coated with tin so that even when the zinc coating breaks into the gap between the surface of the copper gasket 72 coated with tin and the seating surface of the bolt 71 coated with zincate bath, a coating layer of tin is buried into the surface of the copper gasket 72 so that the second fastener member 70 operates as if the tin fills the gap around the coating of the zincate bath peeled off from the bolt 71 and broken into the gap.
  • the seating surface of the bolt 71 and the surface of the copper gasket 72 coated with tin are in contact with each other without any gap despite having the peeled off coating of the zincate bath.
  • the second fastener member 70 by the combination of the bolt 71 coated with the zincate bath and the copper gasket 72 coated with tin does not generate any leakage between the seating surface of the bolt 71 and the surface of the gasket 72.
  • the second fastener member 70 of the compressor 100 has the bolt 71 not coated with the chloride bath. Therefore, COD within the discharged water that accelerates the corrosion of the coating bath in the manufacturing process can be lowered.
  • the second fastener member 70 does not generate any leakage, a highly reliable compressor 100 that substantially suppresses any leakage can be provided.
  • the fastener member 70 used in the compressor 100 of the above embodiment is one embodiment of the fastener member according to the present invention.
  • the fastener member according to the present invention is not limited to those used in a gas compressor such as the compressor 100 of the above embodiment. If there is a fastener target to be fastened to the bolt of the fastener member according to the present invention, the fastener member according to the present invention can be used in anything from a fastener part of a vehicle engine to a fastener part of a vehicle transmission.
  • the fastener member belongs to the technical scope of the present invention.
  • the bolt 71 and the gasket 72 when the bolt 71 is in a state of being fastened to the fastener target, are sufficiently applied coating in correspondence to at least each area in contact between the bolt 71 and the gasket 72. There is no need to apply the corresponding coatings to each entire area of the bolt 71 and the gasket 72.
  • the second fastener member 70 of the present embodiment that fastens the front head 12 and the compressor main body 60 is a fastener member by the combination of the above-described bolt coated with the zincate bath and the copper gasket coated with the tin.
  • the first fastener member 80 that fastens the front head 12 and the case 11 can also be a fastener member by the combination of the bolt coated with the zincate bath and the copper gasket coated with the tin.
  • the first fastener member 80 can achieve the same function and effect as the above-described second fastener member 70.
  • the chloride bath is a coating bath with ammonium chloride as the main component and includes chloride ions. Therefore, it is characteristic that the COD concentration in the discharged water that accelerates the degree of corrosion of the coating bath is high.
  • the zincate bath includes a zinc coating bath having no cyanide or a zinc coating bath of an alkaline including zinc and sodium hydroxide (NaOH) and so on. It is characteristic that the COD concentration of the zincate bath is lower than the chloride bath. Loading against the environment of the zincate bath is also lower than the chloride bath.
  • the inventors of the present application conducted an experiment on the hardness, brittleness and compatibility with the gasket between a bolt coated with the zincate bath (embodiment) and a bolt coated with the chloride bath (example in comparison) and obtained the results shown in the following Table 1.
  • the fastener member by the combination with the bolt coated with the chloride bath does not generate any leakage, but the fastener member by the combination with the bolt coated with the zincate bath generates leakage.
  • a fastener member according to the present invention in a state combined with a bolt coated with a zincate bath, does not generate any leakage or can substantially suppress any leakage.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Gasket Seals (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Compressor (AREA)
  • Bolts, Nuts, And Washers (AREA)
EP08075205A 2007-03-20 2008-03-19 Befestigungsglied und Gaskompressor damit Withdrawn EP1972754A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007071725A JP2008232238A (ja) 2007-03-20 2007-03-20 締結部材とそれを用いた気体圧縮機

Publications (1)

Publication Number Publication Date
EP1972754A1 true EP1972754A1 (de) 2008-09-24

Family

ID=39472502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08075205A Withdrawn EP1972754A1 (de) 2007-03-20 2008-03-19 Befestigungsglied und Gaskompressor damit

Country Status (5)

Country Link
US (1) US20080232993A1 (de)
EP (1) EP1972754A1 (de)
JP (1) JP2008232238A (de)
KR (1) KR20080085783A (de)
CN (1) CN101319674A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9194633B2 (en) 2013-03-15 2015-11-24 Bp Corporation North America Inc. Bolt with integrated gasket
CN105762241A (zh) * 2016-04-28 2016-07-13 厦门乾照光电股份有限公司 一种增强注入型的发光二极管的外延结构制作方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1137076A (ja) * 1997-07-11 1999-02-09 Mitsubishi Heavy Ind Ltd 圧縮機
JP2004092470A (ja) * 2002-08-30 2004-03-25 Calsonic Compressor Seizo Kk 気体圧縮機
JP2004092416A (ja) * 2002-08-29 2004-03-25 Calsonic Compressor Seizo Kk 気体圧縮機
JP2005194553A (ja) 2004-01-05 2005-07-21 Yuken Industry Co Ltd ６価クロムフリー黒色防錆皮膜と表面処理液および処理方法
JP2006144623A (ja) * 2004-11-18 2006-06-08 Calsonic Compressor Inc 気体圧縮機

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5830394B2 (ja) * 1975-08-14 1983-06-29 ウエムラコウギヨウ カブシキガイシヤ アルカリセイアエンメツキヨク
US4861290A (en) * 1987-12-09 1989-08-29 Eaton Corporation Aluminum electrical connector with threaded opening having electroplated layer of uniform thickness
US6611429B2 (en) * 2001-11-21 2003-08-26 Visteon Global Technologies, Inc. Electronic circuit to MG beam grounding method
JP4074320B2 (ja) * 2005-01-24 2008-04-09 株式会社放電精密加工研究所 亜鉛表面を有する金属部材の非クロム防錆処理方法
US20060166013A1 (en) * 2005-01-24 2006-07-27 Hoden Seimitsu Kako Kenyusho Co., Ltd. Chromium-free rust inhibitive treatment method for metal products having zinc surface and metal products treated thereby

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1137076A (ja) * 1997-07-11 1999-02-09 Mitsubishi Heavy Ind Ltd 圧縮機
JP2004092416A (ja) * 2002-08-29 2004-03-25 Calsonic Compressor Seizo Kk 気体圧縮機
JP2004092470A (ja) * 2002-08-30 2004-03-25 Calsonic Compressor Seizo Kk 気体圧縮機
JP2005194553A (ja) 2004-01-05 2005-07-21 Yuken Industry Co Ltd ６価クロムフリー黒色防錆皮膜と表面処理液および処理方法
JP2006144623A (ja) * 2004-11-18 2006-06-08 Calsonic Compressor Inc 気体圧縮機

Also Published As

Publication number Publication date
JP2008232238A (ja) 2008-10-02
US20080232993A1 (en) 2008-09-25
KR20080085783A (ko) 2008-09-24
CN101319674A (zh) 2008-12-10

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